function main() {
    var listenKey = JSON.parse(HttpQuery('https://api.binance.com/api/v1/userDataStream','',null,'X-MBX-APIKEY:'+APIKEY)).listenKey;
    HttpQuery('https://api.binance.com/api/v1/userDataStream', {method:'DELETE',data:'listenKey='+listenKey}, null,'X-MBX-APIKEY:'+ APIKEY);
    listenKey = JSON.parse(HttpQuery('https://api.binance.com/api/v1/userDataStream','',null,'X-MBX-APIKEY:'+ APIKEY)).listenKey;
    var datastream = Dial("wss://stream.binance.com:9443/ws/"+listenKey, 100);
    var update_listenKey_time =  Date.now()/1000;
    while (true){
        if (Date.now()/1000 - update_listenKey_time > 1800){
            update_listenKey_time = Date.now()/1000;
            HttpQuery('https://api.binance.com/api/v1/userDataStream', {method:'PUT',data:'listenKey='+listenKey}, null,'X-MBX-APIKEY:'+ APIKEY);